how are you, man? sit down. ( cheers and applause ) floyd-- floyd, it's always good to see you. now, floyd you are the unified super welterweight world champion. you've won 10 world titles across five different weight classes. you're undefeated as a professional fighter, pound per pound the greatest boxer of all time. but more importantly, you play chess. >> i love chess, stephen. the sweet science. >> stephen: floyd, my friend, is chess as dangerous as the san francisco police say? >> it can be, stephen, but with training, chess can be a symphony of tactics, skills, and creativity. >> stephen: it sound to me like it's a symphony of drugs, vice presidency, and barbecue. ( laughter ) >> stephen, there are always going to be some bad apples on the chess board.